<template>
    <div>
          <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
           <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>


        <!-- 卡片视图 -->
        <el-card>
            <el-alert
                title="添加商品信息"
                type="info" center
                show-icon>
            </el-alert>

            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="ruleFormRef" label-width="100px"  label-position="top">

                <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeTabLeave"
                 @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price" type="number">
                            <el-input v-model="addForm.goods_price"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight" type="number">
                            <el-input v-model="addForm.goods_weight"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number" type="number">
                            <el-input v-model="addForm.goods_number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader clearable
                            v-model="addForm.goods_cat"
                            :options="catelist"
                            :props="cateProps"
                            expand-trigger="hover"
                            @change="cateHandleChange"></el-cascader>
                        </el-form-item>
                        
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 商品参数  渲染表头-->
                        <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id" >
                                <!-- 复选框 -->
                            <el-checkbox-group v-model="item.attr_vals" >
                                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                        
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.attr_id" >
                           <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- action图片上传到的地址 -->
                        <el-upload
                            
                            :action="uploadURL"
                            :on-preview="handlePreview"
                            :on-remove="handleRemove"
                            :headers="headersObj"
                            list-type="picture" :on-success="OnSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>

                    <el-tab-pane label="商品内容" name="4">
                        
                            <!-- 富文本编辑器组件 -->
                            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                            <!-- 添加商品 -->
                            <el-button type="primary" class="AddBtn" @click="Add">添加商品</el-button>
                    </el-tab-pane>

                </el-tabs>
            </el-form>
        </el-card>


        <!-- 图片预览对话框 -->
        <el-dialog
            title="图片预览"
            :visible.sync="dialogVisibleClose"
            width="50%">

           <img :src="previewPath" alt="">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'

export default {
    data(){
        return {
            // 步骤二 动态参数
            manyTabData:[],
            onlyTabData:[],
            // 上传图片的地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传请求头
            headersObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            // 图片预览地址
            previewPath:'',
            // t图片预览窗口的开关
            dialogVisibleClose:false,
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children',
                // 
            },
            activeIndex:0,
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                // 商品分类所属的数组 // 级联选择器选择的内容
                goods_cat:[],
                // 图片的数组
                pics:[],
                // 商品详情
                goods_introduce:'',
                attrs:[]
            },
            // 商品分类数据列表
            catelist:[],
            
            addFormRules:{
                goods_name:[
                    { required:true, message:'请输入商品名称', trigger:'blur'}
                ],
                goods_price:[
                    { required:true, message:'请输入商品价格', trigger:'blur'}
                ],
                goods_weight:[
                    {required:true, message:'请输入商品重量', trigger:'blur'}
                ],
                goods_number:[
                    {required:true, message:'请输入商品数量', trigger:'blur'}
                ],
                goods_cat:[
                    {required:true, message:'请选择商品分类', trigger:'blur'}
                ]
            }
        }
    },
    created(){
        // 获取所有商品分类数据
        this.getCateList()

    },
    methods:{
        async getCateList(){
            const {data:res} = await this.$http.get('categories')
            if(res.meta.status !== 200){
                return this.$message.error('获取商品分类信息失败！')
            }
            this.catelist = res.data
            // console.log(this.catelist);
        },
        // 级联选择器，值改变触发
        cateHandleChange(){
            // console.log(this.addForm.goods_cat);
            if(this.addForm.goods_cat.length !== 3){
                this.addForm.goods_cat = []
                this.$message.error('请选择第三级分类！')
            }
        },
        beforeTabLeave(activeName, oldActiveName){
            // console.log('即将离开', oldActiveName);
            // console.log('即将进入' ,activeName);
            // return false

            if(oldActiveName === '0'  && this.addForm.goods_cat.length !== 3){
                this.$message.error('请选择商品分类！')
                return false
            }
        },
        // tab切换时触发   element定义的
        async tabClicked(){
            // console.log(this.activeIndex);
            if(this.activeIndex === '1'){
                
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params:{ sel:'many'}
                })

                if(res.meta.status !== 200){
                    return this.$message.error('获取动态参数失败！')
                }

                // 字符串 变成数组
                res.data.forEach(item =>{
                    item.attr_vals = item.attr_vals.length === 0 ? []: item.attr_vals.split(',')
                })
                this.manyTabData = res.data
                // console.log(this.manyTabData);
            } else if(this.activeIndex === '2'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params:{ sel:'only'}
                })

                if(res.meta.status !== 200){
                    return this.$message.error('获取静态参数失败！')
                }

                this.onlyTabData = res.data
            }
        },
        // 点击图片预览事件
        handlePreview(file){
            this.previewPath = file.response.data.url
            this.dialogVisibleClose = true

        },
        // 处理移除事件
        handleRemove(file){
            console.log(file);
            //1 即将要删除的图片的临时路径
            const filePath = file.response.data.tmp_path
            //2 从pics数组中，找到这个图片对应的索引
            const i = this.addForm.pics.findIndex(x => x.pic === filePath)
            //3 调用数组的splice方法，把图片信息对象，从pics数组中移除
            this.addForm.pics.splice(i, 1)

        },
        // 上传成功，服务器返回的信息  el-upload返回
        OnSuccess(response){
            // console.log(response);
            // 1 拼接得到一个图片信息对象
            const picInfo = { pic: response.data.tmp_path}
            // 2 将图片信息，保存到data
            this.addForm.pics.push(picInfo)
            // console.log(this.addForm.pics);
        },
        Add(){
            this.$refs.ruleFormRef.validate(async valid =>{
                if(!valid){
                return this.$message.error('请填写必要的表单项！')
                }
                // 执行添加的业务逻辑
                // lodash  cloneDeep(obj)  深拷贝
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = this.addForm.goods_cat.join(',')

                // 处理manyTableData
                this.manyTabData.forEach(item =>{
                    const newInfo = {
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals.join(',')
                    }

                    this.addForm.attrs.push(newInfo)
                })

                // 处理onlyTableData
                this.onlyTabData.forEach(item =>{
                    const newInfo = {
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals
                    }

                    this.addForm.attrs.push(newInfo)
                })

                console.log(form);

                // 发起请求添加商品
                // 商品名称唯一，
                const {data:res} = await this.$http.post('goods', form)

                if(res.meta.status !== 201){
                    return this.$message.error('添加商品失败!')
                }

                this.$message.success('添加商品成功！')

                this.$router.push('/goods')
            })
        }

    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length === 3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>
<style lang="less" scoped>
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.el-dialog img{
    width: 100%;
    
}
.AddBtn{
    margin-top:15px ;
}
</style>
